| 黄河重要水源补给区垂穗披碱草返青期的变化及其影响因子分析 |
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| 引用本文： | 汪治桂,王建兵. 黄河重要水源补给区垂穗披碱草返青期的变化及其影响因子分析[J]. 安徽农业科学, 2011, 39(5): 2870-2872,2875 |
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| 作者姓名： | 汪治桂 王建兵 |
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| 作者单位： | 1. 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃兰州,730020;甘肃省甘南州气象局,甘肃合作,747000
2. 甘肃省甘南州气象局,甘肃合作,747000 |
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| 摘 要： | [目的]探讨黄河重要水源补给区垂穗披碱草返青期的变化及其影响因子。[方法]通过利用黄河重要水源补给区内合作和玛曲农气观测站的牧草观测资料及同期的降水、气温、积温等地面观测气象资料,分析该区垂穗披碱草返青期的变化及其影响因子,[结果]该区内,合作站垂穗披碱草返青期出现了明显提前的趋势,其提前趋势为15.5 d/10a,但玛曲站返青期的年际变化不大。垂穗披碱草的返青与温度的关系随地理位置的不同有明显差别,位于高原边坡地带合作站的该草返青期与热量条件之间有密切联系,初春气温上升导致返青期提前;秋季降水量多可致使垂穗披碱草返青期提前,反之则偏迟。[结论]该研究为甘南黄河重要水源补给区气候与生态环境变化的研究提供依据。
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| 关 键 词： | 黄河重要水源补给区 垂穗披碱草 返青 影响因子 |
Analysis on Varieties of Returning Green Stage in Elymus Nutans and Its Impacting Factors in Important Water Replenishment Region of Upper Yellow River |
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| WANG Zhi-gui et al. Analysis on Varieties of Returning Green Stage in Elymus Nutans and Its Impacting Factors in Important Water Replenishment Region of Upper Yellow River[J]. Journal of Anhui Agricultural Sciences, 2011, 39(5): 2870-2872,2875 |
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| Authors: | WANG Zhi-gui et al |
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| Affiliation: | WANG Zhi-gui et al (Lanzhou Institute of Arid Meteorology,China meteorological administration,Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Lanzhou,Gansu 730020) |
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| Abstract: | [Objective] The study aimed to discuss the varieties of returning green stage in Elymus Nutans and its impacting factors in the important water replenishment region of upper Yellow River in Gannan.[Method] Based on the observation data of the pasture grass and the ground-based observations meteorological data in the same period of precipitation,temperature and accumulated temperature,etc.in the Hezuo and Maqu Agricultural Meteorology Observation Station in the important water replenishment region of upper Y... |
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| Keywords: | Important water replenishment region of upper Yellow River Elymus nutans Returning green stage Impacting factors |
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